GHDD4414 Ver la hoja de datos (PDF) - Oki Electric Industry
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GHDD4414 Datasheet PDF : 24 Pages
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KGL4202
10-GHz 1:8 Demultiplexer
GENERAL DESCRIPTION
Oki’s KGL4202 is a 10-GHz 1:8 demultiplexer designed to operate in 10-Gbps communication links. This
circuit synchronously separates a single 10-Gbps data stream, clocked at up to 10 GHz, into eight lower
frequency data streams, clocked at lower frequency rates. In the KGL4202 demultiplexer, the 10-GHz
master clock is first divided by two, then by four. The 10-Gbps data stream is first divided into two syn-
chronous serial paths, then these two data streams are separated into four each lower speed data streams
and brought out to data latched outputs. Complementary 1/8 synchronous clock outputs are made avail-
able from the KGL4202 for use in synchronizing lower frequency logic.
All signal interfaces are 50 Ω with all inputs internally terminated in 50 Ω. Direct DC coupling is used on
the 10-Gbps data input, the 1.25-Gbps data outputs and phase-locked 1.25-Gbps clock outputs. The 10-
GHz clock input is AC-capacitively-coupled for ease of interfacing at microwave speeds and reducing
ground noise induced phase jitter. The package 10-GHz clock and 10-Gbps data pins are separated by
ground pins to control the I/O impedance, maintain signal isolation and reduce phase noise. The eight
data outputs are distributed to opposite sides of the package to facilitate hardware layout and reduce
noise. Over one third of the chip power is due to the ten 50-Ω outputs.
The KGL4202 is shipped in a 40-pin ceramic flat-package with impedance-controlling ground plane and
flush-mounting bottom heat sink.
FEATURES
• AC-coupled 10 Gbps I/O: eliminates DC
coupled phase jitter
• 1/8 clock generated on chip: easy to
synchronize downstream logic
• Isolated I/O pins: minimizes noise and
impedance variation
• 2 V, 3.2 W
• Packaged in 40-pin ceramic flat-package with
ground plane and heat sink
Oki Semiconductor
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